论文部分内容阅读
为研究进气旋流畸变对轴流压气机性能和稳定性影响的机理,设计了一种叶片式旋流畸变发生器,分别采用定常和非定常计算方法对旋流畸变发生器和两级低速轴流压气机进行了联合数值模拟研究。定常计算结果表明:旋流畸变发生器的叶片弯角越大、对涡强度越高;对涡旋流导致压气机总压比和效率降低,稳定边界流量明显增加;对涡强度越大,对压气机性能和稳定性影响越严重;对涡的反向涡对压气机影响较大,同向涡影响较小;反向涡造成部分叶片的叶根区域吸力面附面层提前分离,是导致压气机失稳的主因;非定常解的总压比和效率均略高于定常解,两种计算方法得到的稳定边界差异明显,非定常解的稳定边界流量比定常解小19.2%,非定常计算结果更接近试验值。
In order to study the mechanism of the influence of intake cyclone distortion on the performance and stability of axial-flow compressor, a vane-type cyclone distortion generator is designed. The cyclone distortion generator and two-stage low-speed shaft Flow compressor for numerical simulation study. The steady-state calculation results show that the larger the blade angle of the vortex distortion generator is, the higher the vortex strength is. The vortex flow causes the total pressure ratio and efficiency of the compressor to decrease, and the steady boundary flow rate obviously increases. Compressor performance and stability of the more serious impact on the vortex of the reverse vortex on the compressor greater impact on the same vortex is small; reverse vortex caused by some leaf blades in the leaf area of the suction surface pre-separation layer is the result of The total pressure ratio and efficiency of the unsteady solution are slightly higher than the steady solution, and the difference between the two methods is obvious. The steady boundary flow of the unsteady solution is 19.2% smaller than the steady solution, The calculated result is closer to the experimental value.